【摘 要】
：
The Zhangwu-Heishan area is located to the east of the Fuxin-Yixian Basin and is mostly covered with volcanic rock.At various periods,different geologists had v
【机 构】
：
State Key Laboratory of Coal Resources and Safe Mining,College of Energy,College of Earth Sciences
论文部分内容阅读
The Zhangwu-Heishan area is located to the east of the Fuxin-Yixian Basin and is mostly covered with volcanic rock.At various periods,different geologists had varying opinions about their age and periods of volcanic eruptions,especially on sequences between volcanic rock and main coal-beating strata,which affect the direction of searching for coal,as well as prospecting the entire research area.During our study,we carried out detailed field investigations in this research area; observed and recorded the main representative outcrops of volcanic rock.We collected over 20 volcanic rock samples and tested the Sensitive High Resolution Ion Microprobe Ⅱ (SHRIMP Ⅱ) U-Pb isotope age of 11 samples.The age of our volcanic rock samples ranged between 56.0 ± 2.9 and 132.3 ± 2.3 Ma.After taking earlier investigations into consideration,we concluded that,except for a suite of paleogene olivine basalt,the volcanic rock in the Zhangwu-Heishan area is younger than the coal-beating Shahai Formation.It is therefore most unlikely to find coal seams equivalent to those of the early Cretaceous Shahai Formation in Fuxin Basin below volcanic rock.
其他文献
基层在路面结构层中起主要承重作用，就目前情况来看，影响水泥稳定碎石基层裂缝形成的原因是多方面的，因此需要进一步加强对其的研究，施工时要在多方面釆取控制措施，严格处理每个施
以长江三角洲流域为研究区域，首先明确了以保护水生生物为目标的优先控制农药品种的筛选原则，并以模型预测为基础，根据农药对水生生物的风险性，筛选形成了长江三角洲流域保护水生
近日,黑龙江省萝北县餐饮住宿行业工会成立大会在县电业局会议室召开,这标志着萝北县餐饮住宿行业工会的正式成立。该联合会的成立,成功迈开了萝北县餐饮住宿行业发展史上具
In this article,a reduced mixed finite element (MFE) formulation based on proper orthogonal decomposition (POD) for the non-stationary conduction-convection pro
近日,江淮重卡在安徽阜阳市举行新产品全国上市首发仪式,首款270马力高顶产品市场售价24.56万元。格尔发中体载货车是在融入了轻量化、节能化、舒适化等新理念的江淮第四代重
Carbonyl sulfide (COS) and dimethyl sulfide (DMS) fluxes from an urban Cynodon dactylon lawn and adjacent bare soil were measured during April-July 2005 in Guan
For reasonable assessment and safe exploitation of marine gas hydrate resource,it is important to determine the stability conditions of gas hydrates in marine s
Objective To investigate the immunotoxicity of acrylamide(ACR) in female BALB/c mice. Methods A total of 200 female mice weighing 18-22 g were randomly divided
The voltammetric behaviour of three 5-nitroimidazoles, metronidazole, tinidazole and ornidazole, was investigated, and a method was developed for the simultaneo
Based on the active site of lanosterol 14α-demethylase of azole antifungal agents, sixteen l-(lH-l,2,4-triazole-l-yl)- 2-(2,4-difluorophenyl)-3-(N-n-butyl-N-l-